Without delay, let's solve this. We've got 43 and we will be multiplying it by 87, that is, adding 43 to itself 87 times.
Step 1: 0 + 43 = 43
Step 2: 43 + 43 = 86
Step 3: 86 + 43 = 129
Step 4: 129 + 43 = 172
Step 5: 172 + 43 = 215
Step 6: 215 + 43 = 258
Step 7: 258 + 43 = 301
Step 8: 301 + 43 = 344
Step 9: 344 + 43 = 387
Step 10: 387 + 43 = 430
Step 11: 430 + 43 = 473
Step 12: 473 + 43 = 516
Step 13: 516 + 43 = 559
Step 14: 559 + 43 = 602
Step 15: 602 + 43 = 645
Step 16: 645 + 43 = 688
Step 17: 688 + 43 = 731
Step 18: 731 + 43 = 774
Step 19: 774 + 43 = 817
Step 20: 817 + 43 = 860
Step 21: 860 + 43 = 903
Step 22: 903 + 43 = 946
Step 23: 946 + 43 = 989
Step 24: 989 + 43 = 1032
Step 25: 1032 + 43 = 1075
Step 26: 1075 + 43 = 1118
Step 27: 1118 + 43 = 1161
Step 28: 1161 + 43 = 1204
Step 29: 1204 + 43 = 1247
Step 30: 1247 + 43 = 1290
Step 31: 1290 + 43 = 1333
Step 32: 1333 + 43 = 1376
Step 33: 1376 + 43 = 1419
Step 34: 1419 + 43 = 1462
Step 35: 1462 + 43 = 1505
Step 36: 1505 + 43 = 1548
Step 37: 1548 + 43 = 1591
Step 38: 1591 + 43 = 1634
Step 39: 1634 + 43 = 1677
Step 40: 1677 + 43 = 1720
Step 41: 1720 + 43 = 1763
Step 42: 1763 + 43 = 1806
Step 43: 1806 + 43 = 1849
Step 44: 1849 + 43 = 1892
Step 45: 1892 + 43 = 1935
Step 46: 1935 + 43 = 1978
Step 47: 1978 + 43 = 2021
Step 48: 2021 + 43 = 2064
Step 49: 2064 + 43 = 2107
Step 50: 2107 + 43 = 2150
Step 51: 2150 + 43 = 2193
Step 52: 2193 + 43 = 2236
Step 53: 2236 + 43 = 2279
Step 54: 2279 + 43 = 2322
Step 55: 2322 + 43 = 2365
Step 56: 2365 + 43 = 2408
Step 57: 2408 + 43 = 2451
Step 58: 2451 + 43 = 2494
Step 59: 2494 + 43 = 2537
Step 60: 2537 + 43 = 2580
Step 61: 2580 + 43 = 2623
Step 62: 2623 + 43 = 2666
Step 63: 2666 + 43 = 2709
Step 64: 2709 + 43 = 2752
Step 65: 2752 + 43 = 2795
Step 66: 2795 + 43 = 2838
Step 67: 2838 + 43 = 2881
Step 68: 2881 + 43 = 2924
Step 69: 2924 + 43 = 2967
Step 70: 2967 + 43 = 3010
Step 71: 3010 + 43 = 3053
Step 72: 3053 + 43 = 3096
Step 73: 3096 + 43 = 3139
Step 74: 3139 + 43 = 3182
Step 75: 3182 + 43 = 3225
Step 76: 3225 + 43 = 3268
Step 77: 3268 + 43 = 3311
Step 78: 3311 + 43 = 3354
Step 79: 3354 + 43 = 3397
Step 80: 3397 + 43 = 3440
Step 81: 3440 + 43 = 3483
Step 82: 3483 + 43 = 3526
Step 83: 3526 + 43 = 3569
Step 84: 3569 + 43 = 3612
Step 85: 3612 + 43 = 3655
Step 86: 3655 + 43 = 3698
Step 87: 3698 + 43 = 3741

So, 43*87 = 3741